Question

Consider the table which contains unique Key and Primary Key .the tables already contains data.If i added any rows to the table i received an error (ORA – 0001) which is due to the duplicate value is added to the Primary Key or Unique Key .Here i am not able to identify whether the error is due to the addition of duplicate value to the Primary Key or Unique Key.Can anyone suggest me how to identify this?

Answer 1

The format of the ORA-00001 message is:

ORA-00001: unique constraint violated (string.string)

where string.string is schema.constraint_name. This is why it is good practice to give our constraints helpful names.

create table t23
   ( id number not null
     , col1 varchar2(30)
     , col2 date
     , constraint t23_pk primary key (id)
     , constraint t23_uk unique (col1)
  )
/